Gage.



E. w. SIMMONS. GAGE. APPLIOATION FILED NOV. 1'], 1905.

919,786. Patented Apr. 27, 1909.

JMQMV.

THE nmRms PETERS co., \vAsHmcmn. n, c.

EUGENE W,- SIMMONS, OFMATI-APAN, MASSACHUSETTS.

GAGE

Specification of Letters, Patent.

Patented A ril 27, 1909.

Application filed Novemberll'Y, 1905. Serial No. 237,824.

To all whom it may concern:

Be it known that 1-, EUGENE W. SIMMONS, of Mattapan, in the county of Suffolk and tate of Massachusetts, have invented a new and useful Improvement in Gages and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to improvements in gages for gaging the grinding of the cutting edges of gear cutters-and other milling cutters.

One object or this invention is to so construct a gage of this nature that the lines of the cutting edges of the teeth of forming cutters may be indicated thereby.

Another object of the invention is to so construct a gage of this nature that the radial lines on which the cutting edges of the teeth of forming cutters are designed to be ground may be indicated thereby.

Another object of the invention is to so construct a gage of this nature, designed to indicate radial lines, that, by suitable adjustment, lines inclined to the radii may be indicated by said gage.

The invention consists in a gage having a hub adapted to be centered in the bore of the forming cutter, and rotatable therein, and having an indicator extending radially therefrom.

The invention also consists in a hub adapted to be centered by insertion into the bore of the forming cutter and having a radially extending indicator, or gage, adjustably' mounted on said hub.

The invention also'consists in-such other novel features o1 construction and combination of parts as shall hereinafter be more fully described and pointed out in the claims.

Figure 1, represents a plan view of the improved gage, parts of a forming cutter being indicated in relation thereto. Fig. 2, represents an edge view of the cutter. Fig. 3,'rep resents a sectional view thereof taken on line 313 Fig. 1, the'center pin being shown in in Similar numbers of reference designate corresponding parts throughout.

It is desirable that the cutting edges of the teeth of milling cutters adapted for use in cutting gears, or as forming cutters tor other work, should be uniformly ground usually with the lines of the cutting edges on radial lines from the axis of the cutter. At times however it is essential that the teeth of said cutters be ground on lines inclined to the radii to bring the cutting edges at the tops of the teeth in advance of the roots or bases of the teeth, or vice versa.

In carrying this invention into practice my desire has been to so construct a gage that it 'may be readily centered on the -forming cutter' and may be rotatable to successively indicate the lines on which the teeth should be ground. thereby insuring uniformity in the cuttingedges of the teeth.

In the drawings 5 indicates a circular hub, of a diameter to be rotatably received in the bore of the forming cutter to be ground, and

- having the axial perforation 6; pivotally secured to this hub 5, by the screw 7, is the gage plate 8 having the axial perforation 9 and the finger 10 having the straight edge 11 extending radially from the axis, in this plate 8 is formed the curved slot 12 through which extends the set screw 13 the end of which is secured in a screw threaded socket in the hub 5. A center pin 14 is also provided which, by its insertion through the perforations 9 and 6 of the gage plate 8 and the hub '7 effects the holding of axes of the hub and the plate in coincidence.

Vt hen it is desired to define radial lines on which the cutting edges of forming cutters are intended to be ground the center pin 14 is (placed in position in the perforations 9 an 6 the screw 13 is then, preferably, set to hold the plate 8 and the hub 5 in axial registration. The hub 5 of the gage may now be inserted in the bore of a forming cutter of suitable size, indicated herein in part ,atA, and the edge 11 of the finger 10 will indicate a line extending radially from this axis of the forming cutter, and this line may be successively indicated for the grinding of all the teeth of the cutter by simply rotating the gage with respect to the cutter. When it is desired to indicate by means of the edge 11, lines which are inclined to the radii of the hub 5 the plate 8 is swung on the pivot 7 to the desired position with relation to the hub 5 and is secured in such position by the set screw 13.

Having thus described my invention, 1 claim as newand desire to secure by Letters Patent.

1. A gage, for indicating the roposed lines of grinding for the teeth of milling cutters, comprising a hub adapted to be rotatably mounted in the bore of the cutter and a radially extending gage having a larger diameter than the hub mounted on said hub.

2. A gage, for indicating the proposed lines of grinding for the teeth of milling cutters, comprising a hub adapted to be rotatably received in the bore of the cutter a gage plate adjustably mounted on said hub, and means for holding the axes of the plate and the hub in registration.

3. A gage, for indicating the proposed lines of grinding for the teeth of milling cutters, comprising a hub adapted to be r0- tatably received in the bore of the cutter, a plate pivoted on said hub and eccentrically of the latter having a gage line extending radially from the axis of said plate, and

and the curved slot 12, the screw 1.25 ex- 1;:

tending through said slot and secured in the hub 5, and the center pin 14 litting the perforations 9 and (i as and. for the purpose described.

In testimony whereof l allix my signature f in presence of two witnesses.

EUGENE W. SIMMONS.

Witnesses:

H. J. MILLER, l. E. TONER. 

